320109990 has 16 divisors (see below), whose sum is σ = 768264048. Its totient is φ = 85362656.

The previous prime is 320109989. The next prime is 320110003. The reversal of 320109990 is 99901023.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5335137 + ... + 5335196.

It is an arithmetic number, because the mean of its divisors is an integer number (48016503).

Almost surely, 2^320109990 is an apocalyptic number.

320109990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

320109990 is an abundant number, since it is smaller than the sum of its proper divisors (448154058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320109990 is a wasteful number, since it uses less digits than its factorization.

320109990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10670343.

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 320109990 is about 17891.6178698294. The cubic root of 320109990 is about 684.0687364663.

The spelling of 320109990 in words is "three hundred twenty million, one hundred nine thousand, nine hundred ninety".